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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 207 (Automatic Transaxle - 4T65-E - Introduction (2 Of 2)) >> Repair Instructions >> Case Extension Housing Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Disconnect the right drive axle from the transaxle. Refer to Wheel Drive Shaft Replacement - Front in Wheel Drive Shafts.
  3. Remove the transaxle brace. Refer to Automatic Transmission Brace Replacement (Front Wheel Drive) , Automatic Transmission Brace Replacement (All Wheel Drive)  or Automatic Transmission Brace Replacement (Front Wheel Drive and All Wheel Drive) .
  4. Remove the vehicle speed sensor. Refer to Input Speed Sensor Replacement .
    5. Fig 1: View Of Case Extension Assembly & Bolts
    GM10517Courtesy of GENERAL MOTORS CORP.
  5. Remove the case extension housing bolts (5).
  6. Remove the case extension housing (6) with the axle seal and the O-ring (8).
    7. Fig 2: Inspecting Case Extension Housing
    GM10606Courtesy of GENERAL MOTORS CORP.
  7. Inspect the case extension housing (6) for the following conditions:
    • A damaged or porous sealing surface for the case extension seal
    • A damaged or porous sealing surface for the vehicle speed sensor
    • A damaged or porous sealing surface for the right drive axle oil seal
    • A damaged or porous sealing surface for the case extension housing
    • A damaged or worn differential carrier bushing or output shaft bearing
    • Damaged bolt holes
    • Inspect the drive axle seal and replace if necessary
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